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Loading and releasing behavior of carboxymethyl cellulose and chitosan complex beads

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Progress in Natural Science:materials International 2022年第6期32卷 715-723页

作者： Ali A.Altam Liping Zhu Dafaalla Babiker Hajo Yagoub Shuguang Yang State Key Laboratory for Modification of Chemical Fibers and Polymer Materials Center for Advanced Low-dimension Materials Donghua University

The complex beads of carboxymethyl cellulose(CMC) and chitosan(CHI) that are fabricated by interfacial complexation have a core-shell structure composed of a thin skin layer and a 3D entangled internal structure,which endows the beads with adsorption possibilities toward anionic and cationic molecules via electrostatic interaction.However,the loading and releasing behavior of such a system is essential and fundamental for their application yet has not been studied systematically.In this work,the influences of beads physical state,adsorbent dosage,agitation speed,solution pH and temperature on the loading behavior were investigated.The CMC@CHI beads demonstrated different loading efficiency to three typical dyes of methylene blue(MB),acid blue-113(AB),and methyl orange(MO) with different charge status.The adsorption rate followed an order of MB> AB> MO,giving 97.4%,73.3% and 20.2%,respectively.The releasing of three dyes from CMC@CHI beads also exhibited different rates,and MB release was found to be prolonged compared to AB and MO.The loading mechanism of dyes was further investigated via X-ray photoelectron spectroscopy.These CMC@CHI beads may have possible applications in mixed dye removal as well as encapsulating systems of drugs or sensitive chemicals with different charges.

关键词： Polysaccharide Encapsulation Loading mechanism Dye removal Interfacial complexation

Flexible Ceramic fibers: Recent Development in Preparation and Application

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Advanced Fiber materials 2022年第4期4卷 573-603页

作者： Chao Jia Zhe Xu Dianfeng Luo Hengxue Xiang Meifang Zhu State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai 201620China

Flexible ceramic fibers(FCFs)have been developed for various advanced applications due to their superior mechanical flexibility,high temperature resistance,and excellent chemical stability.In this article,we present an overview on the recent progress of FCFs in terms of materials,fabrication methods,and applications.We begin with a brief introduction to FCFs and the materials for preparation of FCFs.After that,various methods for preparation of FCFs are discussed,including centrifugal spinning,electrospinning,solution blow spinning,self-assembly,chemical vapor deposition,atomic layer deposition,and polymer conversion.Recent applications of FCFs in various fields are further illustrated in detail,including thermal insulation,air filtration,water treatment,sound absorption,electromagnetic wave absorption,battery separator,catalytic application,among others.Finally,some perspectives on the future directions and opportunities for the preparation and application of FCFs are highlighted.We envision that this review will provide readers with some meaningful guidance on the preparation of FCFs and inspire them to explore more potential applications.

关键词： Ceramic fibers Flexibility Preparation Applications

Visual Detection of COVID‑19 from materials Aspect

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Advanced Fiber materials 2022年第6期4卷 1304-1333页

作者： Gang Wang Le Wang Zheyi Meng Xiaolong Su Chao Jia Xiaolan Qiao Shaowu Pan Yinjun Chen Yanhua Cheng Meifang Zhu State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai 201620China

In the recent COVID-19 pandemic,World Health Organization emphasized that early detection is an effective strategy to reduce the spread of SARS-CoV-2 viruses.Several diagnostic methods,such as reverse transcription-polymerase chain reaction(RT-PCR)and lateral flow immunoassay(LFIA),have been applied based on the mechanism of specific recognition and binding of the probes to viruses or viral antigens.Although the remarkable progress,these methods still suffer from inadequate cellular materials or errors in the detection and sampling procedure of nasopharyngeal/oropharyngeal swab collection.Therefore,developing accurate,ultrafast,and visualized detection calls for more advanced materials and technology urgently to fight against the epidemic.In this review,we first summarize the current methodologies for SARS-CoV-2 diagnosis.Then,recent representative examples are introduced based on various output signals(e.g.,colorimetric,fluorometric,electronic,acoustic).Finally,we discuss the limitations of the methods and provide our perspectives on priorities for future test development.

关键词： COVID-19 Virus diagnosis Rapid and high-throughput detection Visual detection materials aspects

超透、抗菌共轭微孔聚合物-聚酰胺复合膜的表面工程设计

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中国科学:材料科学(英文版) 2023年第8期66卷 3319-3326页

作者：石玉王玉珠毕静婕左宏瑜龙文华张卫懿廖耀祖 State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai 201620China

渗透性和离子筛分能力是决定纳滤膜分离性能的主要指标.扩大渗透分离层的表面积不仅是提升膜通量的有效途径,还保持了盐的截留效果.受氨基/亚胺与酰氯缩合交联形成致密的聚酰胺网络的启发,我们提出了一种策略:将多孔的卟啉-苯胺共轭微... 详细信息

渗透性和离子筛分能力是决定纳滤膜分离性能的主要指标.扩大渗透分离层的表面积不仅是提升膜通量的有效途径,还保持了盐的截留效果.受氨基/亚胺与酰氯缩合交联形成致密的聚酰胺网络的启发,我们提出了一种策略:将多孔的卟啉-苯胺共轭微孔聚合物(PACMP)接枝到聚酰胺膜上,从而增大纳滤膜的分离表面积.通过一步界面聚合,制备了一种超渗透的共轭微孔聚合物-聚酰胺复合膜(CPCMs),其水通量为61.8 L m^(−2) h^(−1),对盐(Na_(2)SO_(4))的截留率高于91.6%.此外,由于PACMPs中卟啉基团产生的活性氧,原位光激发单线态氧1O2可杀死98.5%的大肠杆菌和99.7%的金黄色葡萄球菌,从而赋予了CMP-聚酰胺复合膜良好的抗菌性.

关键词：聚酰胺复合膜界面聚合渗透分离水通量截留率纳滤膜金黄色葡萄球菌聚酰胺膜

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polymer-based hybrid materials and their application in personal health

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Nano Research 2023年第3期16卷 3956-3975页

作者： Ran Cao Yanhua Cheng Ruili Wang Jin Wen Liping Zhu Weiqing Kong Xiaolan Qiao Meifang Zhu State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai 201620China

With unprecedented properties and functions,polymer-based hybrid materials hold extremely important position in many fields.Here in this review,we summarized applications of polymer-based hybrid materials toward personal health.Firstly,theoretical calculation and in-situ visualization used to explore the interfacial interaction and formation of hybrid materials are introduced.Secondly,applications of polymer-based hybrid materials in personal health from proactive protection(anti-bacteria and harmful gas removal),health condition monitoring(breathing and sleep)to disease diagnosis(magnetic resonance imaging),and tissue therapy(dental restoration)are discussed.Additionally,aggregation-induced emission(AIE)organic molecules based optical sensors for personal security and polymer semiconductor for organic thin film transistors are simply discussed.Finally,we present the future tendency for preparing polymer-based hybrid materials that related with personal health.

关键词： hybrid materials protection monitoring biomedical function

Tandem engineering for CO_(2)electrolysis toward multicarbon products

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Nano Research 2023年第7期16卷 8670-8683页

作者： Tinghui Yang Min Kuang Jianping Yang State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai 201620China

Electrocatalysis of CO_(2)toward multicarbon(C_(2+))products have multifaceted applications in the energy and chemical industries,offers an attractive route to mitigate carbon emissions and abate the depletion of fossil fuels.However,the productivity of CO_(2)-to-C_(2+)products suffers from a low selectivity and reaction rate owing to the difficulty in C-C coupling and the multiple electronproton transfer steps.Recently,numerous tandem catalysts have been developed to improve the selectivity and formation rate of CO_(2)-to-C_(2+)products via coupled multiple reaction steps,exhibiting high industrial practicability.This review summarized recent progresses in the formation of C_(2+)products from CO_(2)electrolysis on tandem catalysts.In this review,we highlight the cooperative regulation strategy of tandem catalysts formed by introducing different types of new components and reveal the relationships between*CO intermediate mass transport and the selectivity of C_(2+)products.Moreover,theoretical insight into the tandem catalytic mechanisms underlying the enhanced C_(2+)selectivity is also provided.Finally,the remaining challenges and opportunities for the electrocatalytic CO_(2)toward C_(2+)products are discussed.

关键词： CO_(2)electrolysis tandem catalysts mass transports spillovers multicarbon compounds

Confinement fluorescence effect of an aggregation-induced emission luminogen in crystalline polymer

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Aggregate

Aggregate 2023年第5期4卷 112-119页

作者： Lan Zhou Linlin Zheng Xiaoxiao Yu Mengyue Gao Chengjian Xu Yifan Ge Tianxiang Bai Jin Wen Yanhua Cheng Meifang Zhu State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghaiChina

Despite the impressive progress of stimuli-responsive fluorescent materials,little is known about the influence of confinement created by crystalline polymer over the fluorescence properties of fluorescent molecules.The effects of confinement on the fluorescence of an aggregation-induced emission luminogen(AIEgen)are investigated using computational simulations,which reveal that the confined space induces the AIEgens to take a more planar conformation,resulting in a red-shifted emission spectrum.With this property,the study is extended to explore the confinement generated by various polymer crystalline forms,and it is shown that different fluorescence colors are activated.This confinement fluorescence effect is attributed to the different spatial dimensions of the polymer amorphous layer between lamellar crystals where the AIEgens are located.These results indicate the immediate association between crystalline structure and fluorescence signals,activating unprecedented photophysical properties of luminescent materials,and also providing the possibility for crystalline structure visualization,it is important for the many polymer crystallization processes occurring in the materials processing.

关键词： aggregation-induced emission confinement fluorescence effect polymer crystalline structure

Boron heteroatom-doped silicon-carbon peanut-like composites enables long life lithium-ion batteries

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Rare Metals 2022年第4期41卷 1276-1283页

作者： Fang-Zhou Zhang Yuan-Yuan Ma Miao-Miao Jiang Wei Luo Jian-Ping Yang State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai 201620China

Carbon coated Si core–shell structures have been proposed to solve the adverse effects of Si-based anode.However,designing ideal core–shell architecture with excellent surface and interface properties is still a significant challenge.Herein,a novel peanut-like structure of B-doped silicon/carbon nanoparticle(Si@B-C)synthe-sized by sol–gel process and subsequent thermal reduction is reported.The peanut-like Si@B-C electrode demon-strates a superior cyclability of 534 mAh·g^(-1)after 1000 cycles at high current density of 1000 mA·g^(-1).The exceptional electrochemical performance is attributed to the boric acid-induced highly interconnected peanut-like structure and boron heteroatom framework could provide a continuous electron pathway to reduce the irreversible lithium ion loss during rapid cycling.This work provides insight into the development of the heteroatom-doped Si-based anodes with stable cycling performance for LIBs.

关键词： Lithium-ion battery Silicon anode Peanutlike structure Boron doping Long cycle life

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Scalable carbon black deposited fabric/hydrogel composites for affordable solar-driven water purification

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Journal of materials Science & Technology 2022年第11期106卷 10-18页

作者： Ying Guo Congqi Li Peiling Wei Kai Hou Meifang Zhu State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai 201620China

Interfacial solar-driven evaporators have presented great potential for water purification owing to their low energy consumption and high steam generation efficiency. However, their further applications are hindered by the high costs and complicated fabrication processes. Here, a scalable bilayer interfacial evaporator was constructed via an affordable technique, in which carbon black deposited nonwoven fabric(CB@NF) was employed as the upper photothermal layer, as well as PVA/starch hybrid hydrogel for selffloating and water transport. Under simulated one sun irradiation, CB@NF layer displayed excellent photothermal conversion performance, whose temperature could increase 30.4 ℃ within 15 min. Moreover,the introduction of starch into PVA endowed the hybrid hydrogels with considerable water-absorption capability on the premise of ensuring mechanical properties. The resultant CB@NF/PVA/starch composites achieved superior interfacial adhesion performance with interfacial toughness at about 200 J m.Combining with good evaporation performance, salt-rejection property and high purification efficiency on pollutants, this evaporation system would become a promising candidate to alleviate water shortage.

关键词： Fabric/hydrogel composite Interfacial solar-driven evaporation Water purification

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